8.
Check that TRIP and START contacts operate according to the configuration logic.
9.
Release the blocking of the high set stage and check the operate and reset value and the
time delay for the high set stage in the same way as for the low set stage.
10. Finally check that START and TRIP information is stored in the event menu.
Information on how to use the event menu is found in the operator's
manual.
12.8.1.2
Overcurrent feature with current restraint
SEMOD56488-35 v3
The current restraining value has also to be measured or calculated and the influence on the
operation has to be calculated when the testing of the operate value is done.
Procedure
1.
Operate value measurement
The current restraining value has also to be measured or calculated and the influence on
the operation has to be calculated when the testing of the operate value is done.
12.8.1.3
Overcurrent feature with voltage restraint
SEMOD56488-44 v5
Procedure
1.
Connect the test set for injection of three-phase currents and three-phase voltages to
the appropriate current and voltage terminals of the IED.
2.
Inject current(s) and voltage(s) in a way that relevant measured (according to setting
parameter
CurrentInput and VoltageInput) currents and voltages are created from the
test set.
Overall check in principal as above (non-directional overcurrent feature)
3.
Operate value measurement
The relevant voltage restraining value (according to setting parameter
VoltageInput) has
also to be injected from the test set and the influence on the operate value has to be
calculated when testing of the operate value is done.
4.
Operate time measurement
Definite times may be tested as above (non-directional overcurrent feature). For inverse
time characteristics the START value (to which the overcurrent ratio has to be calculated)
is the actual pickup value as got with actual restraining from the voltage restraining
quantity.
12.8.1.4
Overcurrent feature with directionality
SEMOD56488-60 v5
Please note that the directional characteristic can be set in two different ways either just
dependent on the angle between current and polarizing voltage (setting parameter
DirPrinc_OC1 or DirPrinc_OC2 set to or in a way that the operate value also is dependent on the
angle between current and polarizing voltage according to the I · cos(
F
) law (setting
parameter
DirPrinc_OC1 or DirPrinc_OC2 set to I · cos(
F
). This has to be known if a more
detailed measurement of the directional characteristic is made, than the one described below.
Procedure
Section 12
1MRK 502 067-UEN B
Testing functionality by secondary injection
198
Commissioning manual